BIOS 195 Exam 4 - reaction? –Answer activation energy 2. all ca...

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BIOS 195 Exam 4

• the presence of a catalyst changes which one of the following characteris- tics of a chemical

reaction?–Answer activation energy

• all catalysts...

–Answer increase the rate of the reaction

• a chemical reaction accompanied by or requiring the absorption of energy, the products

being of greater free energy that the reactants; requires energy-

–Answer endergonic

• a chemical reaction accompanied by the release of energy; the products have less free energy

than reactants –Answer exergonic

• the maximum amount of non-expansion that can be extracted from a ther- modynamically

closed system –Answer Gibbs Free Energy (G)

• the free energy change for a reaction

–Answer delta G

• a state in which opposing forces or influences are balanced

–Answer equilibrium

• a number that expresses the relationships between products and reactants of a reaction at

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–Answer equilibrium constant (Keq)

• the minimum quantity of energy which the reacting species must possess in order to undergo

a specific reaction –Answer activation energy (Ea)

• a substance that is produced by a living organism which acts as a catalyst to bring about a

specific biochemical reaction –Answer enzyme

• the substance on which an enzyme reacts

–Answer substrate

• reduce the activity of enzyme

–Answer inhibitors

• increase the activity of enzyme

–Answer activators

• where the substrate binds to the enzyme

–Answer active site

• energy that is available to do work

–Answer free energy

• Is delta g positive or negative during a endergonic reactions?

–Answer positive (G>0)

• Is delta positive or negative during an exergonic reactions?

–Answer

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